Removable-unit oil-switch.



G.-A. BURNHAIVI.

REMOVABLE UNIT OIL SWaTCH.

APPLICATION EILED FEB. 8. X9Il.

Patented Dec. 28, 1915.

2 SHEETS-SHEET 2.

WW W0@ a if@ fue PATENT OFFICE.

MASSACHUSETTS, ASSIGNOR, BY

. CT C COMPANY, A CORPORATION OF liu..

au@ @von ein don up or i eT not only i the sl'uiou open-allor 'honecessity oi liso "Je :imperi uro eiuplovedM involves the use, ol oil.und

'the su'ileh uui'lv4 :iro eonunoeilj.' :nude :i wliulxlr sruoturi: whichwinno, ho rxuiniued or paired without dunger lo the operator. lt. is urouuuon xruetiee. to provide menu 'for uiting lhe su'illeh oui'l orrendering iL deuil,

Specification of Letels Eatent.

atenfed Dec. 28, 191 5.

Serial No. 607,367.

but the provisions are inadequate to insure of the operators with veryhigh volto( l@ is he object of my invention to guard ogni Sii :my dangerto the operator and to pernii reudy und rapid removal of a defec- /ireswitch and the equally rapid substitu- YLion of :i spur@ ono i goodworking order. enrigviug out: this object l mount the Snitch in suoli :iivny thut it is sliduhly reluied to tho high potential bus bars withwhich it is normally Connected, and I provide :i nieehunieul lockinter-related to th saune operutingy niechunisin which governs Llie,uuiliingfl und breaking of tho circuit, so hui when the circuit isclosed the switch element is uieeluiniczill-v locked in position, butwhen the circuit is broken and the switch parts :ire electrically deudtho Ine- 'cui lool; disengaged :ind the, switch muy he removed bodily.il necessary. in rinse of dunurge, lo any switch unit ho veriquicklyremoved from its pooiion vvih rolution to the distribution rirlfuiln und:i sound unit loe substituted for iii. Thus, there is bul'y u briefinterruption of servioe on tho eiruuit or oireuits which the switchConil-olas und uo serious discomfort to '-lie coiusunierzy occurs. lpreferably so :112 runge ne ports in eonnuuniezil'ion with the ons hui 1hut 'when the switch is removed no opoori'imiii' will exist lorureidentul Contact the ogereitor in the courge of his duty uhh expoedhigh potenliul parts.

l "fi' invonl'ion therefore consists o'l :i high i 'wird milch oreireuil breaker in the ii'orin oi" n removable unit` which muy beu'ihdrnun hodil)r from tho high potential conductors. und moans forcontrolling the,`

described-and will be definitely indicated in the 'alunneI l f In theaccompanying lrzwvingsf which illustrate severa-l terms of constructionbodyng myinventien, Figure l is e. seef tional elevation of :iSwitchboard einberlgfingg 1t-group of switeh units ernhoclying my iii--vention. Fig. 2 is e, View showin et the units in a stage of iteremotelrom supplyeor distribution circuit. i

detail/view of the switehheerol ol l? l. F 1g. 1s e sectional ViewShen/inge merlmeei'.

form of remombleswiteh"unit embodying my invention. A Referring new indetail to the lrmvin and first .vithre'ferenee te Figs. l., 2 en lvrepresents a switchboard, Y "i may he made of slate, marble or othererniler fire-- -proef-insiilat'ing meterinh and. carrying; 25 pluralityol shelves er breekt 2 forming; open-front Cells` for e group et eileiwit-l s 3, 3a, 3b, yeach of which hai'e typen-of een` ynectingSwitches 1l, el v(See Fig,y leerling tol terminals beneath the eil. inthe cont-nin ing .tanks and arranged to yield for purposes ofaliner'nent by a pivotal connection, as seen in Fig.- l., so that it eenne ."lirl into and ont of engagement With e lnn'ieil clip or Contact inan insulator mounted on the switchboard.; ,Vl'ien in service, euchSwitch is locked in place hy e, hoek G enrriefl n by sliclzible rofl Y,which iney he raie e end lowered by an operetor when necessary :nietwhen lin its ranged position passes through 40 an opening in :a eestingsecured te :i Sivit/eh, The rod '7 also carries en erin 9 wliieh engagesan eye 1G attached to e, weeclen rod 11 carrying bridging eo tante byWhieh ie `eireuit elosecin the oil eell. l"Jlieri the oil'switch is slidinto position, the rofl 9 engages the eye l0 hy passing; thi-engl@ Thus,it will be evident that when tin r is pushed up, .the bridging centen.

12,/ iS brought into engagement with th 1 (l een tacts 13, 13a whichcloses the cire/nie et the switch, and,simultaneously with thie elythe'hook arm 6 enters the @peni` fj casting 8 and mechnieally locks theunit from being tile switch moved until, by proper 5,5.4 downwardmovement .of the reci 7'.; the eir# enit of the switch is opened,nelsinnzltene ously therewith the switch ievcliseenneetefl so that vitmay then, being demi., stely he` lil handled. It is therefore,`impossible/,t0 remove the switch 'excei'it when the eiienit through. 1t1s broken. The control nzeehmiienn for effecting these operations islocated :it zi point distant from the. hifghpotmutn maf-.hm

'18 inl i i ation, ne ,hv 'ne similar (ler eirenit i Cvf,

:z a nenni,

e i'mn'elile ri mty er othf will el? the in lll. ith this that when :i

minted on the fn :inether ie npel'nt 120 .'l. lullig'. -ny which perl;m" n :i heeel eenneeting. e leb therein einer f3 .frlwitchefi throughwhich the rod 9 may operate. In this lase l mount also a secondinsulator 24 on the rear side ot the hood in alinement with the clip 25so that when the switch. unit is slid toward the board the connectionwill he automatically established. In this case there are no liveexposed parts, all surfaces carrying high potential on the front of thehoard being inaccessible to contact on the part ot' an operator. The oilvessels may be o'li any approved construction, as for example, agalvanized or wrought iron tanl suitably mounted with insulating fiber,a construction common in the art.

i-laving thus described my invention, what I claim new and desire tosecure by Letters Patent, is z- 1. A high potential switch comprising aplurality ot oil tanks mounted in separate insulating compartments, eachprovided with fixed and movable contacts, high potential terminals inthe compartments inclosed within insulating walls, disconnectingswitches connected with the fixed switch contacts and adapted. to beslid into' engagement with the inclosed terminals, whereby the switchmay be bodily withdrawn and another switch substituted, means forlocking the switch against removal` an operating board located at adistance from the support for the oil switch, means upon the operatingboard for operating the swit h locking means and connections between theswitch locking means and the (mei-ating means therefor upon saidoperatingboard.

2. The combination ot a high potential terminal, a switch mounted topermit bodily movement thcreotl toward and. away trom said terminal andcon'iprising relatively movable coperating contacts, a switch actuatingmend/ier movable only in a direction transverse to the direction ofbodily movement of said switch. a fletffuhable electrical connectionbetween said terminal and one of said contacts, and automatic clutchingmeans 'for mechanically ,:oi'mecting said coperating contact to saidactuating member and automatically unclutching it from said member inresponse to bodily movement of said switch toward and away from saidterminal.

3. The combination with an insulating support, ot' a plurality ofremovable oil switches in separate insulating cells one upon the otheron the front side of the support, high potential terminals adapted tomake a separate connection with the switches, a lock bar for engagingeaclnoi" the switches while they are in closed circuit relation andmeans operated at a distance. Yfrom the switch for actuating the lockbar and simultaneously opening the circuit.

ifi. The combination of circuit terminals, an oil switch bodily movabletoward and away from said terminals, telescoping con movable switchactuating member, means,

for automatically attaching the movable contact of the switch to saidmember by movement of said switch into operative position, an insulatinghood mounted on said switch to prevent access to all live parts whilesaid switch is in operative position, and locking means controlled bysaid actuat-v ing member to prevent the removal. of said switch whileclosed.

5. The combination of an insulating support, a plurality of highpotential switches slidably mounted thereon in open end cells anddetachably connected therewith by a slip ioint, means for locking theswitches against removal, and an operating board distant from theswitches provided with devices for cordinately -controlling the circuitof the switches and the locking means.

6. The combination of circuit terminals, an oil switch bodily removablefrom electrical connection with said terminals and comprising fixedcontacts and a movable contact, non-removable operating means foractuating said movable contact, clutching mechanism for rigidlyconnecting said movable contact to said operating means aut0- matieallvby the placing of the switch in operative relation to said terminals,and a locking member actuated by said operating means tor locking saidswitch in position while said switch is closed.

7. The combination with an oil switch` having .fixed and movablecontact-s and being removable 'from its operating position, ofnon-removable operating means for said switch. and stationary terminalsin connection with which the fixed contacts of the switch are adapted tobe placed, said switch and said operating means being adapted to beplaced in operative,y relation and its fixed contacts placed inconducting relation to said stationary terminals by the placing of theswitch in its operating position.

8. The combination with a switch operating mechanism and xed terminalsadjacent said mechanism, of an oil switch mounted tor bodily movementtoward and awav from said terminals and said mechanism, said switchcomprising fixed contacts normallyy in electrical connection with saidterminals and a movable contact normally lockedrto said operatingmechanism, means for permitting said contact to be electrically andmechanically disconnected from said mecha nism by bodily movement ofsaid switch, and o, locking member mounted on said zich Auatingmechanism to engage said switch and prevent bodily movement thereof,away from said terminals While said switch is closed. A v

9. The combination of stationary termi 11a-ls, a switch operatingmechanism adjecent said terminals and coml'nieing a vertically movablemember having :i horizontal projection thereon, on oil switch mountedfor bodily horizontal movement toward and away from seid terminals andcomprising 'fixed contacts normally connected electriea-lly to smaltermlnals when said switch 1s in normal posit-ion and :i verticallymovable eoopemting Contact having en eye engaged by said projection whensaid switch is in normal position to lock said movable contact to seidvertically lmovable memberE and in terloclting means on seid member andon said switch to prevent horizontal moyeinent thereof Wsw from saidvterminals While said switch is closed. v

in testimony Whereoii lf my signature, in presence of two witnesses.

,EORGE AUGUSTUS BURNHAM.

A, C. NELSON, '-E. C. VVATERHOUSE.

